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Large-particle perovskite single crystal/polymer composite thick film, photoelectric detector and preparation method

A photodetector and perovskite technology, which is applied in semiconductor/solid-state device manufacturing, photovoltaic power generation, electric solid-state devices, etc., can solve problems such as the difficulty in preparing perovskite single crystal thick films, achieve excellent charge transport performance, and prepare The effect of simple process and low cost

Inactive Publication Date: 2019-05-28
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the preparation of perovskite single crystal thick film is very difficult, and the preparation and detector based on perovskite large single crystal particle and polymer composite thick film have not been reported yet.

Method used

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  • Large-particle perovskite single crystal/polymer composite thick film, photoelectric detector and preparation method
  • Large-particle perovskite single crystal/polymer composite thick film, photoelectric detector and preparation method
  • Large-particle perovskite single crystal/polymer composite thick film, photoelectric detector and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Such as figure 1 As shown, the preparation method of the large-grain perovskite single crystal / polymer composite thick-film photodetector provided in this embodiment includes the following steps:

[0038] 1) Preparation of methylamine lead iodide salt (CH 3 NH 3 PB 3 ) perovskite single crystal, the methylamine lead iodide salt was fully dissolved at 60°C to obtain a saturated solution, and after filtration, it was continuously heated at 120°C for 6 hours to obtain a methylamine lead iodide salt perovskite single crystal, in which the large particle perovskite The ore single crystal diameter is 1.5cm;

[0039] 2) After drying the methylamine lead iodide perovskite single crystal in step 1), perform mechanical grinding and sieving to obtain methylamine lead iodide perovskite single crystal particles, and dry in a vacuum oven at 60° C. for 24 hours. The obtained single crystal particle diameter is 500nm;

[0040] 3) A mixed solution of the methylamine lead iodide per...

Embodiment 2

[0044] Such as figure 1 As shown, the preparation method of the large-grain perovskite single crystal / polymer composite thick-film photodetector provided in this embodiment includes the following steps:

[0045] 1) Preparation of methylamine lead bromide (CH 3 NH 3 PbBr 3 ) perovskite single crystal, fully dissolve methylamine lead bromide salt at 40°C to obtain a saturated solution, filter and continue heating at 100°C for 4 hours to obtain methylamine lead bromide salt perovskite single crystal, in which large particle perovskite The ore single crystal diameter is 1cm;

[0046] 2) After drying the methylamine lead bromide perovskite single crystal in step 1), perform mechanical grinding and sieving to obtain methylamine lead bromide perovskite single crystal particles, and dry it in a vacuum oven at 80° C. for 16 hours. The obtained single crystal particle diameter is 800nm;

[0047] 3) The mixed solution of the methylamine lead bromide salt perovskite single crystal pa...

Embodiment 3

[0051] Such as figure 1 As shown, the preparation method of the large-grain perovskite single crystal / polymer composite thick-film photodetector provided in this embodiment includes the following steps:

[0052] 1) Preparation of formamidine lead iodide salt (CH(NH 2 ) 2 PB 3 ) perovskite single crystal, fully dissolve formamidine lead iodide salt at 70°C to obtain a saturated solution, filter and continue heating at 130°C for 8 hours to obtain formamidine lead iodide salt perovskite single crystal, in which large particle perovskite The ore single crystal diameter is 0.5cm;

[0053] 2) After drying the formamidine lead iodide perovskite single crystal in step 1), perform mechanical grinding and sieving to obtain formamidine lead iodide perovskite single crystal particles, and dry it in a vacuum oven at 100° C. for 12 hours. The obtained single crystal particle diameter is 900nm;

[0054] 3) A mixed solution of formamidine lead iodide salt perovskite single crystal partic...

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Abstract

The invention provides a large-particle perovskite single crystal / polymer composite thick film, a photoelectric detector and a preparation method. The preparation method comprises the following steps:step 1, fully dissolving perovskite to obtain a saturated solution, conducting filtering, and conducting continuous heating to obtain a perovskite single crystal; step 2, drying the perovskite singlecrystal, carrying out mechanical grinding and screening to obtain perovskite single crystal particles, and carrying out vacuum drying to obtain single crystal particles with the diameters of 500nm-10[mu]m; step 3, dispersing the single crystal particles in a polymer solution to prepare a dispersion liquid; and step 4, spin-coating the dispersion liquid on a transparent conductive substrate deposited with a hole transport layer to prepare the large-particle perovskite single crystal particle and polymer composite thick film, and annealing the composite thick film on a hot platform at a spin-coating rotating speed of 100-4000 rpm. The composite thick film provided by the invention has the advantages of excellent charge transmission performance, high response speed, high stability, low darkcurrent and noise, simplicity and convenience in preparation and the like.

Description

technical field [0001] The invention belongs to the field of photoelectric thin film devices, and in particular relates to a large-grain perovskite single crystal / polymer composite thick film, a photoelectric detector and a manufacturing method. technical background [0002] In recent years, hybrid perovskites have received extensive attention as "star materials" in the field of optoelectronics. Due to its high light absorption coefficient, adjustable semiconductor band gap, excellent carrier transport performance (long lifetime, high mobility and long diffusion length), and low-cost solution processing or low-vacuum low-temperature evaporation preparation, hybrid calcium Titanium materials have become one of the most promising semiconductor materials in the field of optoelectronics today, and have achieved rapid development in the application of solar cells, light-emitting diodes and photodetectors. Especially in photoelectric detection, perovskites have shown great potent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/48H01L51/42
CPCY02E10/549
Inventor 林乾乾彭家丽
Owner WUHAN UNIV
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